Rear-mounted aerodynamic structures for cargo bodies

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The Stemco Lp patent solves the following problem:

Trucking is the primary means of long-distance and short-haul transportation of goods and materials in the United States, and in many other countries. Trucks often include a motorized cab where the driver sits and working on cars. cab attached to a box-like cargo section. Smaller trucks often include an integrated cargo section sitting in a unified framework which extends from the front wheels to the rear wheel assembly. The larger trucks often includes a detachable cab unit, with many driven axles, and a special trailer with a long box-like cargo units served on two or more phrases assemblies wheels. These trucks assemblages commonly called semi-trailers or tractor trailers. Most modern trucks' cabs, especially for tractor trailers, fitted with aerodynamic fairings on the roof, side and front. These fairings to help direct air over the exposed surface of the box-like cargo body, generally gave higher (a few feet) than the average roof cab. The flat, projecting front face of a cargo body is a strong source of drag on the cab roof. The use of the front-mounted aerodynamic fairings in recent years have served to significantly lower drag and, therefore, raise fuel economy for trucks, especially those traveling at high speed in the open roads.

Our analysis of this patent is as follows:

Stemco Lp’s patent US 9457847 B2 deals with Rear-mounted aerodynamic structures for cargo bodies.
A rear-mounted aerodynamic framework for taking a cargo body includes a three or four-sided structure with a deployed position to help improve flight efficiency in cargo body. The cargo body may be the body of a trailer of a tractor-trailer vehicle or trailer towed behind a vehicle like a truck. It consists of a trailer body or other body cargo well-known in the art. A destroyer run guard mounted on a top surface of the rear cargo body, as additional aerodynamic structures or as a standalone destroyer for cargo bodies. The three or four-sided rear-mounted aerodynamic structure can contain any of a variety of illustrative embodiments shown and described herein.

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